Jung Won meets Eun Gyu the first time when his friends bully her because she works in an amusement park in a fullbody dragon costume. She pours his drink over his head and runs away. Later, she meets him again: he is their new neighbour. Jung Won gets Eun Gyu to know and ends up falling in love with him. But when she meets his bandmembers for the first time she comes along her exboyfriend. A long time ago he beat her up badly and now tells her to go away from his dear friend Eun Gyu, or it will happen again. Can Jung Won and Eun Gyu protect happiness?